How to generate .p12 format file from .cer?

Question

ubuntu

There is a .cer file with the content:
-----BEGIN CERTIFICATE-----
<key>
-----END CERTIFICATE-----
We need to generate a .p12 file based on the .cer file. Google did not help, since the mechanism for generating private keys and how to "blind" them with .cer is not clear

Answer 1

The private key is created at the same time as the public key. This is the very first step of any certificate.
Then a certificate request is created containing only the public (!) Key, it is sent to the CA, and the CA issues the actual certificate. That is:
1) one CER certificate is not enough to create a PKCS#12 container (private key + certificate)
2) somewhere where you created a certificate request, you also have a private key - find it and follow the instructions that you found on google.